IF statements - pick correct solutions

FD  INPUT-FILE
    DATA RECORD IS INPUT-REC.
01 INPUT-REC.
   05  IDNO            PIC XXXXX.
   05  NAMZ            PIC X(20).
   05  SALARY          PIC 9(6)V99.
   05  DEPT            PIC XX.
   05  JOB-CLASS       PIC X.
   05  OVT-CLASS       PIC X.
   05  HRS-WK          PIC 99.
   05  OVT-PAYHR       PIC 999V99.
Pick the correct solution(s) to the following problems. NOTE: There can be more than one correct solution.

Problem #1: You want to move OKAY to a message area for all people who have a salary greater than 50000 and a job classification of either A or B.

Choice A:
IF SALARY > 50000 AND JOB-CLASS = "A" OR JOB-CLASS = "B"
   MOVE "OKAY" TO MSG-PR
END-IF
Choice B: 
IF SALARY > 50000
    IF JOB-CLASS = "A"
        MOVE "OKAY" TO MSG-PR
    ELSE
        IF JOB-CLASS = "B"
            MOVE "OKAY" TO MSG-PR
        END-IF
    END-IF
END-IF
Choice C: 
IF SALARY > 50000
   IF JOB-CLASS = "A" OR JOB-CLASS = "B"
       MOVE "OKAY" TO MSG-PR.
Choice D: 
IF SALARY > 50000 AND (JOB-CLASS = "A" OR JOB-CLASS = "B")
    MOVE "OKAY" TO MSG-PR.
Choice E: 
IF SALARY > 50000 
    IF JOB-CLASS = "A" OR JOB-CLASS = "b"
        MOVE "OKAY" TO MSG-PR.
Problem #2: If the person is eligible for overtime hours (Y in OVT-CLASS), and the hours worked is greater than 40, you want to multiply the hours worked by the overtime pay and put it into the salary in working storage and move the salary in working storage to the print line, if the person is not eligible for overtime hours or if they did not work over 40 hours you want to move their salary to the print line.

Choice A: 
   
IF OVT-CLASS = "Y" 
    IF HRS-WK > 40
         MULTIPLY HRS-WK BY OVT-PAYHR
             GIVING SALARY-WS
         MOVE SALARY-WS TO SALARY-PR
    ELSE
         MOVE SALARY TO SALARY-PR
    END-IF
ELSE
    MOVE SALARY TO SALARY-PR
END-IF
Choice B: 
IF OVT-CLASS = "Y" AND HRS-WK > 40
    MULTIPLY HRS-WK BY OVT-PAYHR
        GIVING SALARY-WS
    MOVE SALARY-WS TO SALARY-PR.
ELSE
    MOVE SALARY TO SALARY-PR.
Choice C: 
IF OVT-CLASS = "Y"
    IF HRS-WK > 40
        MULTIPLY HRS-WK BY OVT-PAYHR
            GIVING SALARY-WS
        MOVE SALARY-WS TO SALARY-PR
    ELSE
        MOVE SALARY TO SALARY-PR
ELSE
    MOVE SALARY TO SALARY-PR.
Choice D: 
IF OVT-CLASS = "Y" AND HRS-WK > 40
    MULTIPLY HRS-WK BY OVT-PAYHR
        GIVING SALARY-WS
    MOVE SALARY-WS TO SALARY-PR
ELSE
    MOVE SALARY TO SALARY-PR
END-IF
Problem #3:If the person is eligible for overtime hours (Y in OVT-CLASS), and the hours worked is greater than 40, you want to multiply the hours worked by the overtime pay and put it in the salary in working storage and move the salary in working storage to the print line along with the message OVERTIME, if the person is not eligible for overtime hours you want to move their salary to the print line along with the message NOT ELIGIBLE or if they did not work over 40 hours you want to move their salary to the print line along with the message NOT OVER 40.

Choice A: 
IF OVT-CLASS = "Y" AND HRS-WK > 40
    MULTIPLY HRS-WK BY OVT-PAYHR
        GIVING SALARY-WS
    MOVE "OVERTIME" TO MSG-PR
ELSE
    MOVE "NOT ELIGIBLE" TO MSG-PR
END-IF
Choice B: 
IF OVT-CLASS = "Y" 
    IF HRS-WK > 40
         MULTIPLY HRS-WK BY OVT-PAYHR
             GIVING SALARY-WS
         MOVE SALARY-WS TO SALARY-PR
         MOVE "OVERTIME" TO MSG-PR
    ELSE
         MOVE SALARY TO SALARY-PR
         MOVE "NOT OVER 40" TO MSG-PR
    END-IF
ELSE
    MOVE SALARY TO SALARY-PR
    MOVE "NOT ELIGIBLE" TO MSG-PR
END-IF
Choice C: 
IF OVT-CLASS = "Y"
    IF HRS-WK NOT > 40
        MOVE SALARY TO SALARY-PR
        MOVE "NOT OVER 40" TO MSG-PR
    ELSE
        MULTIPLY HRS-WK BY OVT-PAYHR
            GIVING SALARY-WS
        MOVE SALARY-WS TO SALARY-PR
        MOVE "OVERTIME" TO MSG-PR
ELSE
    MOVE SALARY TO SALARY-PR
    MOVE "NOT ELIGIBLE" TO MSG-PR.